NFL's safest helmet ever may not be enough to stop concussions
The VICIS ZERO1: Engineering a Safer Football Helmet - GrabCAD Blog
Why Marine City Cardinal Mooney football spent $35,000 on new helmets
How Notre Dame hopes to help a helmet revolution
Alex Smith Is Wearing a New Helmet Designed to Reduce Concussions
How Much Do NFL Helmets Cost?
NFL to prohibit use of certain helmets for 1st time – The Denver Post
Varsity Football Helmet Ratings
Helmets protect athletes' skulls. Will the NFL use neuroscience to protect their brains?
VICIS - Fox News story features VICIS and the development
NOT EVEN THE MOST ADVANCED HELMETS CAN PREVENT CONCUSSIONS. - Tozuda
The First Plastic Football Helmet Often Broke on Impact - The Atlantic
Hearing Tuesday in concussion lawsuit against NFL